package com.heima.app.gateway.filter;


import com.heima.app.gateway.util.AppJwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.omg.CORBA.IRObject;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * 全局过滤器
 */
@Component
@Slf4j
public class AuthorizeFilter implements GlobalFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //1.获取request对象与response
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        //2.判断是否登入
        if (request.getURI().getPath().contains("/login")) {
            //放行
            return chain.filter(exchange);
        }
        //3.获取token
        String token = request.getHeaders().getFirst("token");
        //4.判断是否有token
        if (StringUtils.isEmpty(token)) {
            //没有拦截
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
        }
        //5.判断token是否有效
        Claims claimsBody = AppJwtUtil.getClaimsBody(token);
        int i = AppJwtUtil.verifyToken(claimsBody);
        if (i == 1 || i == 2) {
            //过期拦截
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
        }
        //6.放行
        return chain.filter(exchange);

    }

    @Override
    public int getOrder() {
        return 0;
    }
}
